Adjustable miter box



July 21, 1925. l 1,547,034

M. S. DEARBORN I ADJUSTABLE MITER BOX M. S. DEARBORN ADJUSTABLE MITER BOX July 2l, 1925.

Filed Jan. 21, 1925 3 Sheets-Sheet 2 INVENTOR ,Moses 1S. Dearol;

Z' ATTORNEY.

July 21, 1925.

M.' 5. DEARBORN ADJUSTABLE MITER BOX Filed Jan, 2l, 1925 3 Sheets-Sheet 5 `1111x5125 ,SLD

Patented July 21, 1925.

MOSES S. DEARBORN, OF OAKLAND, CALIFORNIA.

ADJUSTABLE'MITER Box.

Application led January 21, 1925.. Serial '.No. 3,883.

To all cli/Om 'it may conce/m.'

Be it known that l, Moens S. Dnnnonn, a citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented certain new and useful Iniprovements in Adjustable Miter Boxes, of which the following is a specification.

This invention relates to certain improvements in miter boxes, and has for its object to provide a box of such class, in a manner as hereinafter set forth, with means to enable a saw to be held in a vertically in clined plane while cutting diagonally across an object, so as to cut angles 'in two directions at the same time and further whereby the saw will be effectively maintained in its various adjustments and further whereby the saw adjustments can be conveniently obtained when occasion requires.

Further objects of the invention are to With the Aforegoingand other objects in` view, theinvention consists of the novel of parts, as hereinafter more specifically described and illustrated in the accompanying drawings, wherein `is shown an embodiment of the invention, but` it is to be understood that changes, variations and modifications can be resorted to which fall within the scope of the claims hereunto appended.

ln the `drawings 'ii/herein like reference characters denote corresponding throughout the several views Figure 1 is a top plan view of a miter box l A5, Fig- 6 is a sect-ion on line 6 6, Figparts of a pair of spaced lengthwise aligning` outer sections 1, 2 of 'substantial length and each having its inner end inclined as at 3. Y i The inclined inner ends of the sections l, 2 extend in opposite directions with respect to each other and the inclination of each of said ends is outward in a direction towards tlieouter side edge of the section. The sections 1, 2 are spaced from each other at the inner corners thereof. The table top further includes an intermediate section, referred to generally by the reference character 4:, and which is arranged belowY and extends forwardly and rearwardly from the sections 1, 2.` The section "4 comprises a rectangular body portion 5, a forward segment extension 6 and a rear semi-circular extension 7. The extension 6 terminates in the end edges of the body portion and `further projects forwardly from the outer l j vside edges of the sections 1, 2. The body provide, 1n a manner as hereinafter set portion 5 is of a length to extend from a lpoint Vbet-ween the inner end and outer end of the section 1 to a point between the inner end and outer end of the section 2. The body portion 5 of the` section 4E is secured to the sections 1 and 2 by holdfast devices 8 arranged in proximity to the inner end`3 of the sections 1 and 2. The semi-circular j Vp'rojef'ztioln 7 is positioned centrally of the construction, combination and arranfcrem entv rear edge 9 of the body 'portion 5 of the section 4 and is materially smaller than v'extension 6.

The section 1, as well as the section 2 at its rear thereof, is formed with a vertically disposed flange 10, provided near its bottom with a lengthwise extending rectangular slotY 11, and further having its inner end,

vertically7 disposed for a. `portion of its height as at 12 and the remaining portion upwardly and outwardly inclined as at 13. The inclined portion of the inner end of the flange of the section 1 extends in an opposite direction with respect to the inclined portion of the iangeA of the section 2. The vertical portions 12, at the inner ends of said flange extension, are spaced from each other.

lThe table further includes a pair of inf verted yoke-shaped supports each consisting of a head-piece 14, a pair of legs 15 depending from the head-piece 14 and each of which is laterally anged at its lower end, as at 16. The head-pieces 14 are of a length greater than the width of the sections 1 and 2 and projects rearwardly therefrom. The sections 1 and 2 are secured to the `headpieces 14 by the holdfast devices 17. The flanges 16 are apertured as at 18 for the passage of holdfast devices-to finedlysecui'e the table top in position.

Extending from the inner end-3' of thel section 1 to the inner end 3 .of thesection2,

as well as being secured to and 'positioned on -the upper. face of the section .4, is asegment-sliaped bar .19 provided wit-ha gradu-y ated scale 20. .The bar 19 also projects on the extension 6, and associating with the scale 2O isA a. pointer 21.

Pivotally supported from the tableandi extending yforwardly andV rearwardly therefrom. is an angleadjusting mechanism for a tiltablesaw carrier. vThe said angle adjusting mechanism comprisesa flat rectangular plate 22 and a flat rectangular .plate 23 positioned against the lower faceof the yplate 22 -and..wliich 4is of .less length thanfthe lengt-h of thelatter. .The plate `23 projects rearwardly from the plate .22 and is formed boltf26 projects# A spacing member 29 isy secured to the upper face `vof the plate22 near the forward end :thereof andwhich isl arranged beneath the projection 6.

Secured to the lower face of thefplate v22, at the `forward end fthereof, is an angleshaped finger-piece 30v to facilitate-the shifting of theplates 22. and v23 when occasion requires.-

The `plate22 projects forwardly from the.

projection 6, of the section 4, and "has secured toits upper face, -forwardly of the projection 6, an angle-shaped :member .31 which overlaps the upper..face of the` projection-6 and said-member31 has the pointer 21 formed integral therewith and. offset with respect thereto. The pointer 21 overlaps thev bar 19 soas to co-act with .the scale 20 when.

shifting they plates 224 and 23 for thepurpose of adjusting the 'saw carrier at an angles.- Extejnding' throughthemembers 29 and 30,

as well as theplate22, and..further-threadably engaged therewith, is aV set .Screw 32,

which binds against the lower vface of the` proj eet-ion'6, for thefpurpose of maintaining the plates l22 and 23 in position to which they have been adjusted with .respectto the scale.

The plates 22 and 23, rearwardly of the table top, are forme-d with lengthwise eX- tending rectangular openings 33 which register witli each other and the plate 22 at its rearr endis formed with a transverse opening 34 registering with a transverse opening Y35 formed in the plate 23 forwardly of the flanget.

' Mounted against the upper face of the plate 23, and against the forward face of the flange 24, is a quadrant-shaped member 36, having a centrally disposed depending portion 37 which projects through the opening735.. Holdfas't devices 38 are employed forfixedly securing member 36 to the fiange l24. The member 36 projects a substantial distance above the flange 24 and has secured to its forward face a flat segmental bar 39 provided with a graduatedscale 40.

Arranged forwardly of the member 36, as

well as projecting thereabove, is avertically ,disposed lever armv 41, which extends through the openingy 35. The lever arm 31 is pivotally mounted on a bolt y42, which extends through the lower portion of said arm, said member 36 and the flange 24. The

v.bolt A42 projects rearwardly from the flange v24 andcarries a washer 43 and a clamping nut 44. The rear. face of the lever arm 41 is grooved as at 45 to provide a. clearance for .the.bar 39 when the lever is shifted in either direction... The rear face of the lever arm .41,has secured therewith, above the member 36, by .the` holdfast devices 46, an angleshaped bracket .47, which overlaps the rear of the, member 36 and carries a set screw 48 adapted to bind against the member 36 for the purpose. of. maintaining the lever arm 41, -in the positionto which it has been adjusted. ...The upper end of the lever arm 41 is provided with a lengthwise opening 49 for `a purpose to be presently referred to.

The' y:saw-carrier comprises a saw Guide lvsection and. a coupling.. section and the former consists of alpair of side members each formed of a flattopbar 49, a vvertically ,disposed .front bar 50 and a. vertically disposed rear bar 51.- The rear bar 51 of one of theside members is extended rearwardly to provide upper and. lower projections 52, 53 and withthe former of greater length than the latter.. The projection 52 is positioned at thetop of suchside member and .the projection 53 at the bottom. thereof, The top bars 49 of the side members are arranged. below the upper ends of the front .and rear bars thereof. VArranged between the upper portions of the side members is a longitudinally extending spacing member .54, securedin positionwby holdfast devices and having its lower edge positioned ,slightly belowv the upper edge of the top bars 49. Secured to the inner face of each front bar, 50, as well vas the inner face of each rear bar 51, is a vertically disposed saw pasllO sage forming member 56. The members 56 carried by the bars 50 are spaced of each other and the members 56 carried by the bars 51 are spaced of each other. Holdfast devices 57 are employed for fixedly securing a spacing member 54 to its respective bar of a side member of the saw guide. The bars 50 are arranged a substantial distance from the bars 5l so that the saw guide will overlap the work operated on, which is indicated at 58 in Figure 4.

Connected to one of the side members of the saw guide, through the medium of an attaching bracket 59, is a saw depth gauge 60. j

The coup-ling section of the saw guide consists of an angle-shaped attaching member 6l, having one of its arms, indicated at 62, ixedly secured by the holdfast devices 63 to the forward face of thel lever arm 4l. The other arm of the member 6l, and which'is indicated at 641-, projects forwardly and has pivota-lly connected at its top, as at 65, a forwardly extended link 66. The arm 64, of the member 61, at its lower end, has pivotally connected there: with, as at 67, a forwardly extending link 68. The link 66 is pivotally connected to the projection v52 as at 69 and the link 68 is pivotally connected to the projection 53 as at 70 and said link 68 projects forwardly with respect to the link 66. The; construc- `tion o-f the coupling section permits of the links 66 and 68 to be swung on the pivots 65 and 67 to a vertical position carrying 4 the saw guide therewith whereby the latter can be held in an elevated position and snspended at right angles with respect tothe links 66 and 67 when these latter are shifted to vertical position. The saw guide can swing on the pivots 69 and 7 0;

The connecting of the saw carrier to the lever arm 4l permits of the carrier to be adjusted at various vertical inclined planes, as when the leve-r arm Lil is adjusted with respect to the Scale 40 the saw-carrier will be carried therewith. The` adjustment of the saw-carrier by the angle adjusting mechanism therefor and the further adjusting of the saw-carrier by the lever arm 4l enables the saw to be held in a vertically inclined plane while cutting diagonally across an object, so as to cut angles in two directions at thel same time.

An adjustable guide mechanism is employed in connection lwith the saw-carrier for the purpose of guiding thesaw guide in the position to which it has been adjusted and also to permit of the saw carrier to tilt away from a vertical plane.` The said `guide mechanism comprises a pair of vertically disposedv back rest extension slides, between which passes the saw carrier, and which are automatically shiftable j towards and from the saw carrier to permit it to tilt away from the vertical plane. The said slides are indicated at 7l, 72, are mounted on the flanges 10 and shift lengthwise, and further the said slides are spring controlled and the controlling spring therefor will be presently referred to. The slides 7l and 72 are bent to overlap the upper portions of the flanges 10 and each of said slides has connected therewith a depending bracket 73 through the medium of a coupling element 74 which extends through the ripper portion of the bracket 73, through a slot ll and is secured to the lower portion of the slide. Each bracket 73 is arranged rearwardly of the flange 10 and has mounted therein a grooved roller 75. Each bracket 73 is Jfurthermore provided with a forwardly extending angle-shaped arm 76, and the arm 76 of one bracket 73, is connected to the arm 76 ofthe otherbracket 73 by a coiled pulling spring 77, which extends transversely of the lower face. of the plate 23 and provides the controlling spring for the slides 7l, 72.

Mounted between the section 4 of the table top and the washer element 28 is a semi-circular projection 78 which swings on the pivot bolt 26. Formed integral with and extending rearwardly from the projection 78, as well as positioned rearwardly with respect to the section 4L, is a shiftable curved actuating plate 79 having its side edges bearing against the rollers 75, and said plate 79 provides means for moving one of the slides 7l, 72 relatively to each other when the plate is shifted in a manner to be presently referred to. The lower face of the plate 79 is formed with `a segmentshaped rack 80. Secured to the lower face of the plate 213, forwardly of the opening 33, is a bearing bracket 81 and secured to the lower face of the plate 23 in proximity to the rear end thereof is a bearing bracket 82. Journaled in the brackets 81 and 82 is a spring controlled shaft 83 capable of being shifted lengthwise with respect to the plate 23. The shaft 83 carries a gear or pinion 84 adapted to mesh with the rack 8O for the purpose of shifting the plate 79 whereby one of its side edges bearing against a roller 75 will cause the shifting of one slide relatively to the other against the action of the spring 77 and permit the saw carrier to tilt away from the vertical plane.

vWhen it is desired to adjust the sawcarrier in a vertical inclined plane, the pinion 84C is shifted clear of the rack 8O and for such purpose the shaft 83, carries a handle member 85 on its rear end and said member 85 has an offset upper portion 85 carrying a pin 86 for connecting the member 85 to the lever arm 4l. The opening 49 provides means for the passage of the pin 86 to couple the handle member 85 to the lever arm 41 thereby locking the Shaft 88; The member 85 has its rear face formed witha series of cavities 86 to receive the 'pin 86 to maintain member 85 in a vertical position., The slots 33 in'l the plates 22 and 23'provide a clearance to eiia'ble the shifting of the pinion 84 clear of the rack 80. See' dotted line position Figure 4. After the shaft 88 has been released it can be adjusted and locked by the shifting of the 'handle member 85 towards the lever 41, so that pin" v86 will engage in the lever arm 41,4 but such shifting movement rocks the shaft 83 in the desired direction whereby thevplate 7 9 will be shifted thereby moving` 'one of the slides, and after the shaft 88 is locked the slide will support the saw-carrier in adjusted position and owing to the action of the controlling spring for the slides they will bind against the saw-carrier and support it.

Extending through the plates :22 and 23 Ais a shiftable locking device 87 which includes upper and lower plates 88, 89, re- -.sp,ectively. The plates 22 and are formed with aligning'slots 9() in which the locking` device can shift and said plates 88 and 89 are of greater [width and greater length than the slots 90. The plate 88 overlaps the Kfgfrooved actuatinl'g` plate 79 and constitutes ymeans .for maintaining it in parallelism with respect to the plate 22. The locking device'slides back and forth Vin the slots 90,

but overlaps the actuatin-gplate T9 under all conditions and further prevents the spring- `ing upwardly of the rear ofthe plate 79 relative to tli'e vplate 22. The plate 29 is arranged below the plate 28.

The controlling spring for the shaft 83 is indicated at 91 and is interposed between a lguide 92 and a pinion 84 and wlie'n released Athe said spring 90 acts as a means to maintain the pinion 84 in mesh with the rack 80. Then the shaft 83 is shifted rearwardly to yuninesli `the pinion 84 from the raclr 8O such movement is had against the action of the Vspring 91 and when the pin 86 is in engagement with one of the cavities 86 the spring 91 acts to hold the handle member 85 in a vertical position. lVhen the spring 91 is released it further acts to maintain the offset portion 85', of the handle member 85, in Contact with the rear face of the leverfarm 41. The guide 92 is secured to and depends from the plate 23 and when the shaft 83 is shifted rearwardly the pinion 84, in connection with'the guide 92, compresses the spring 91 whereby the tension is applied thereto,

so that when the handle member 85 is re leased the spring 91 will cause the pinion 84 to be shifted in mesh with the rack 80.

It is thought that the many `advantages of the mite-r box in accordance 'wvith this invention can be readily understood, and although in the construction herein shown and described, theinvention is embodied in its preferred form, yet it yis to be understood the changes in details of construction can be readily had without departing from the invention as claimed.

What I claim is 1. A 'miter box comprising a table, a saw carrier angle adjusting meohanisin pivotally mounted thereon and including means for positioning the saw carrier at an angle with respect t0 the work and in a plane inclined to the vertical, a saw carrier connected to said mechanism and bodily shiftable there with, and a ypair of back rest extension slides between which passes the saw carrier, said slides automatically shiftable towards and from the carrier to permit it to tilt away from a vertical plane.

2. A miter boxcomprising a table, a saw carrier angle adjusting mechanism pivotally mounted thereon and including means for positioning the saw carrier at an angle with respect to the work and in a. .plane inclined to the vertical, a saw carrier connected to said mechanism and bodily shiftable therewith, a pair of bach iest-ertension slides between which passes the saw carrier, said slides automatically shiftable rtowards and 'from the carrier to permit it to tilt away from a lvertical plane, and means for adjusting one of said slides relatively to the the other.

3. A yiniter box comprising a saw carrier, an angle adjusting mechanism therefor and including means for vpositioning said saw carrier at a plane vinclined to the vertical, and a pair of back restextension slides one shiftable relatively to theother to permit the carrier to tiltaway from the vertical plane,said slides 'automatically shifted towards tli'e carrier. y

4. A miter box comprising a saw carrier, an angle adjusting mechanism therefor and including means for positioning said saw carried at a plane inclined to the vertical, a pairof back resteiitension slides one shiftable relatively to the other to permit the carrier to tilt away from the vertical plane, said slides automatically shifted toward the carrier, and means for shifting said slides one relatively to the other away from the carrier.

5. A miter box comprising a saw carrier, an angle adjustingimechanism therefor and including means for positioning said saw carrier at a plane inclined to the vertical, a pair of back rest extension slides oneshiftable relatively to the other to permit the carrier to tilt away from the vertical plane` said slides automatically shifted toward ine carrier, means for shiftingsaid slides one relatively to the other away from the carrier, sai saw carrier connected to said adjusting mechanism, a table on which said carried by the table and engaging with said mechanism for` locking it in adjusted position.

6. A miter box comprising a saw carrier, an angle adjusting mechanism therefor and including means Vfor positioning said saw' carrier at a plane inclined to the vert-ical, a pair of back rest extension slides one shiftable relatively to the other to permit the carrier to tilt away from the vertical plane, said slides automatically shifted towards the carrier, means for shifting said slides one relatively to the 'other away from the carrier, said saw carrier connected to said adjusting mechanism, a table on which said mechanism is pivotally mounted, means carried by the table and engaging with said mechanism for locking it in adjusted position, and the said means for shifting one of said slides relatively to the other detachably engaging with said mechanism for main-.

taining the adjusted slide in adjusted position.

7. A miter boX comprising a table, a saw carrier angle adjusting mechanism pivotally mounted thereon, a saw carrier, adjustable means carried by said mechanism and connected with the carrier for shifting it to a plane inclined to the vertical, a pair of shiftable back rest extension slides, one arranged at each side of the saw carrier and providing means to permit the latter to tilt away from a vertical plane, and means carried by said mechanism for shifting one ofA said slides relatively to the other.

8. A miter boX comprising a table, a saw carrier angle adjusting mechanism pivotally mounted thereon, a. saw carrier, adjustable means carried by said mechanism and connected with the carrier for shifting it to a plane inclined to the vertical, a pair of shiftable back rest extension slides, one arranged at each side of the saw carrier and providing means to permit the latter to tilt away from a vertical plane, and means carried by said mechanism for shifting one of said slides relatively to the other, said means for shifting the slides and said mechanism having coacting means to retain the adjusted slide in adjusted position.

9. A miter box comprising a saw' carrier formed of a shiftable saw guide section and a shiftable coupling section, said saw guide section having its rear end pivotally connected to the forward end of the coupling section whereby when the coupling section is shifted said saw guide section can eX- tend at right angles with respect thereto,

said saw guide section provided with a saw passage, an angle adjusting means for said saw carrier, said coupling section pivotally connected with said angle adjusting means whereby said coupling section can be swung upwardly with respect to said angle adjusting means carrying the saw guide section therewith and whereby the latter can be positioned at right angles with respect to the coupling section.

l0. A miter box comprising a saw guide, a pivotal supporting mechanism therefor permitting j iositioning said guide diagonally with respect to the work and at a plane inclined to the vertical, and means for con necting the rear end of said guide to said mechanism, said means including a plurality of parallel pivoted links for permitting shifting said guide upwardly while maintaining it parallel.

l1. A miter box comprising a saw guide, a pivotal support therefor and permitting positioning said guide diagonally with rerespectto the work, adjustable means carried by said support and connected with the saw guide for positioning the latter' at a plane inclined to the vertical, said support and said means having coacting elements for locking said means in adjusted position,

means for detachably locking said support from movement, and a spring controlled 4 back rest mounted on the support and shiftable towards and from the carrier to permit the latter to tilt away from a vertical plane.

l2. A miter box comprising a saw guide, a pivotal support therefor and permitting positioning said guide diagonally with respect to the work, adjustable means carried by said support and connected with the saw guide for positioning the latter at a plane inclined to the vertical, said support and said means having coacting elements for locking said means in adjusted position, means for detachably locking said support from movement, a spring controlled back rest mounted on the support and shiftable towards and from the carrier to permit the latter to tilt away from a vertical plane, and operating means for said back rest, said operating means and said means for adjusting a saw carrier at a plane inclined to the vertical having coacting elements forl detachably locking said operating means from movement.

In testimony whereof, I affix my signature hereto.

MOSES S.V DEARBORN. 

